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EXC_BAD_ACCESS with AVAssetExportSession and AVMutableComposition

I record audio separately from creating MPEG4 video in the iphone app. I am trying to combine them using AVAssetExportSession.

The audio session uses 1 channel, kAudioFormatAppleLossless and AVAudioQualityMax. The video is AVVideoCodecH264 using the kCVPixelFormatType_32ARGB pixel format. This silent video plays perfectly on my iphone through the photo library.

The exporter tells me that these are supported presets, I use AVAssetExportPresetHighestQuality:

(
    AVAssetExportPresetAppleM4A,
    AVAssetExportPresetLowQuality,
    AVAssetExportPresetHighestQuality,
    AVAssetExportPreset640x480,
    AVAssetExportPresetMediumQuality
)

and this tells me that this is a supported file type:

(
    "com.apple.quicktime-movie"
)

If I switch to AVAssetExportPresetPassthrough, I get file types

(
    "com.apple.quicktime-movie",
    "com.apple.m4a-audio",
    "public.mpeg-4",
    "com.apple.m4v-video",
    "public.3gpp",
    "org.3gpp.adaptive-multi-rate-audio",
    "com.microsoft.waveform-audio",
    "public.aiff-audio",
    "public.aifc-audio"
)

I tried quicktime movie and mpeg 4 as outputFileType and still get the same results.

EDIT: May 10

- . ... !

. .mp4, exportSession setOutputFileType: AVFileTypeQuickTimeMovie, presetName: AVAssetExportPresetPassthrough

+3
1

. , , - . .mp4, AVFileTypeQuickTimeMovie AVAssetExportPresetPassthrough.

+2

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